I have a Mac Pro 2008 and I am thinking of switching from DSL to Cable ISP. This would require me to relocate my modem and router to the other side of the room since the cable outlet is on that side. That would mean I would have to go wireless on my mac pro desktop. What are my options? I see that Apple store online does not sell the Airport Extreme Card (PCI Wireless card) anymore. Also, would I lose any performance using wireless? I am actually gaining speed going from DSL to Cable 3.0 mbps to 12 mbps. Even though wireless performance is fast(G 11mbps or N 54 mbps), does real world performance suffer?